In unison

Men often work in unison to accomplish political or religious reforms.

“Naturally, this game can take some time but we've got plenty of that. Are you ready!" We shouted in unison, "Yes!"

This sense of an ensemble gained in meaning when, as eight of the dancers swayed in unison, the ninth walked slowly and unshakingly toward the audience and then held her hands out, as if ritualistically offering the dance to us.